Add Gitea CI workflow; fix ruff lint issues

tests/test_acceptance.py

@@ -8,7 +8,8 @@ The `seeded_client` fixture pre-populates:
              BrandX 002 (id=3, retired)
 """
 
-import pytest
+import io
+import json as _json
 
 
 # ------------------------------------------------------------------ #
@@ -169,7 +170,7 @@ def test_edit_details_percentage_valid(seeded_client):
     data = _json.loads(seeded_client.get("/export/all.json").data)
     bat = next(b for b in data["batteries"] if b["id"] == 1)
     assert bat["battery_percentage"] == 100
-    assert any(l["battery_id"] == 1 and l["source"] == "manual" for l in data["pct_logs"])
+    assert any(entry["battery_id"] == 1 and entry["source"] == "manual" for entry in data["pct_logs"])
 
 
 def test_assign_battery(seeded_client):
@@ -699,9 +700,6 @@ def test_bulk_install_filters_by_size(client):
 # Import
 # ------------------------------------------------------------------ #
 
-import io
-import json as _json
-
 
 def _make_import_payload(devices=None, batteries=None,
                          charge_logs=None, capacity_tests=None, pct_logs=None):